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Spider Chalk Mega Block

Spider Chalk Mega Block

Regular price $ 42.95
Regular price Sale price $ 42.95
Sale Sold out
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 Pure Magnesium Carbonate Chalk for Climbing & Powerlifting (USA-Made)

Spider Chalk manufactures pure, lab-grade magnesium carbonate block chalk in 8oz (220 grams) Mega Blocks.

  • Lasts Longer - Pure chalk lasts longer on your hand and has better grip with superior drying ability.
  • More Dense - Our manufacturing process makes the blocks less brittle so they don't break into pieces and make a mess.
  • More Chalk - Spider Chalk Mega Blocks are 3x the density of standard blocks.
  • Pure Chalk - Other blocks turn slimy when you sweat. We use only magnesium carbonate with enhanced drying ability even in sweaty environments.
  • Made in the USA - All conventional 2 oz blocks are made in the same factory and private labeled. We are the only chalk company that manufactures blocks in the USA, and we're proud to make Mega Blocks at our facility in Atlanta, GA.
  • Sanctioned For Powerlifting - Approved for all IPF and USAPL Powerlifting competitions. Used in Hyrox and CrossFit events.
  • NEW XEROLITE™ Option - Mega Blocks with XEROLITE™ for Advanced Moisture Control.

Mega Blocks last 2x longer than conventional blocks
1 lb Spider Chalk = 2 lbs of regular blocks.

We are the only manufacturer of climbing chalk and weightlifting chalk in the USA. Our process ensures that your blocks last longer, create less dust and grip stronger.

Mega Blocks 2 lbs - $42.95 (free shipping)
XEROLITE™ Blocks 2 lbs - $48.95 (free shipping)

2 lbs of Spider Chalk is equivalent to 4 lbs of regular 2oz blocks sold in packs of 8 per box.

Read reviews to confirm that Mega Blocks SAVE money by less wasted chalk.

Gyms, weightrooms and climbing facilities all across the USA (and in 21 countries) use Spider Chalk Mega Blocks, and they are now the standard for any weightlifter, powerlifter, gymnast or rock climber. We do not use fillers, binders or drying agents. Our manufacturing process produces a denser, cleaner and more pure block.

8 oz Mega Block Dimensions:
Weight: ~220 Grams
Length: 4"

Width: 3.5"
Thickness: 2.5"
2x 8oz Blocks Per Box = 1lb Chalk


XEROLITE™ has higher drying ability and increased friction compared to magnesium carbonate chalk.

Grip loss does not occur because chalk “runs out” but because moisture overwhelms the material’s ability to manage hydration. XEROLITE™ addresses this at the materials-science level, delivering higher absorption capacity, longer functional dryness, and more consistent friction during high-output training.

XEROLITE™ outperformed conventional chalk in testing across multi-modal domains including weightlifting, armwrestling, pickleball, tennis, golf, pole, disc, shooting, gymnastics, powerlifting, strongman, Ninja, CrossFit, Hyrox and track & field.

----

What Spider Chalk Is:
Pure magnesium carbonate chalk products manufactured in the USA. Designed for maximum dryness and grip.

Ideal For:

  • Rock climbing

  • Bouldering

  • Weightlifting / Powerlifting

  • CrossFit & Hyrox

Why It’s Better:

  • 100% lab-grade MgCO₃

  • Zero fillers or drying agents

  • Consistent hardness — Mega Blocks don't crumble prematurely

  • Longer surface life per application

Specs:

  • Weight: 8 oz block

  • Material: MgCO₃

  • Manufacturing: USA

Material Tags:

  • magnesium carbonate

  • pure MgCO3

  • lab grade chalk

  • XEROLITE™

Use-Case Tags:

  • climbing chalk

  • powerlifting chalk

  • gym chalk

  • weightlifting grip

  • crossfit chalk

Category Tags:

  • chalk block

  • chalk powder

  • USA made

View full details
  • 5 stars: 129 (92%)
  • 4 stars: 11 (8%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
B
Brian

Love the chalk. Doest fall apart as easy as regular chalk

A
Anonymous
This is the best chalk i’ve used

This is the best chalk i’ve used.

A
Anonymous
Awesome quality

Awesome quality, durability, price!

S
Sheldon W.
Less IS more

Very impressed with this chalk. My members are actually able to use less chalk so my floors are cleaner too.

D
Duffy H.
Awesome product.

Awesome product.

C
Chris S.
Survey

Slightly upset i am a gym owner and asked for samples for my members to try and hopefully buy bulk order but was told my gym is too small to accomodate such a request

A
Andre G.
chalk review

Stays on longer than regular chalk

B
Brandon B.
Love the chalk

I really enjoy Spider Chalks. It gives you a better grip than other chalk.

j
joshua d.
Vreatvpurchase

Love the chalk, Love the bucket covers even more

T
Thomas P.
Good chalk

I like the feel of the chalk

T
Thomas P.
Good chalk

Works well in our Crossfit gym

J
Jaymye A.
Great Product!

Best chalk ever. Buy it.

M
Marvin P.
Spider chalk

It works fine for lifting

W
Wendy S.
Superior Chalk!

This chalk is more sticky and less messy than any brand we've used...we won't go back to anything else!

E
Eugene T.
Thanks

Great chalk, awesome grip

A
Andrew R.
Great Chalk

I received the mega block yesterday and used it for my deadlift workout. When applying the chalk to my hands, the block didn't break apart like most other chalk blocks, I didn't have to reapply the chalk after every set either. I would recommend this to anyone who powerlifts and is looking for chalk that will last longer and won't crumble as soon as the block is pressed against your hands.

S
Sheldon W.
The only chalk I will use

This chalk is great. Lasts longer and the company is speedy with orders.

A
Adam M.
Best chalk

Best chalk hands down, will definitely stock up with more

S
Shayn K.
Spider Chalk, Bricks

Excellent. What i bought is going to last me a long time.

N
NATE B.
Great chalk

Didn't know what to expect, figured chalk is chalk. I was definitely wrong. Spider chalk is amazing, very dense block doesn't break, crumble or cause excessive dust. I left a block in the chalk bin at the gym and 3 weeks later its still in one piece. The chalk itself feels great in the grip, stays dry, and has a positive feel on the bar. Works great applied directly to your hands of course, but also great for chalking straps for deadlifts and shirt for squats.
I know this 5lb order will last a very, very long time.
Extremely happy with my order.

R
Richard T.
Great chalk.

Blocks stay together nicely. Chalk works nicely and at a great price.

J
Jordan A.
I love it

This chalk is perfect. It should last me a very long time since it’s just for me at my home gym, and it only takes one application. Don’t know what else I could ask for

M
Michael M.
Great Chalk

Definitely the best chalk I've ever owned and a noticeable difference over cheaper chalk from other commercial sports stores. Bought this as a recommendation from Alan Thrall, and happy I did. Shipping for the first package was awful and not as advertised and all my blocks came broken. But customer service was excellent and sent me a new batch that came perfect. Very satisfied. Thanks!

T
Thomas P.
Good chalk

Great chalk. Have used other kinds and this one is great

J
Julio R.
Best chalk

Best chalk I've ever used

M
Max M.
Good quality

The edges were getting chipped away at first but ive had the same block now for a couple months and its still going strong. I gave a block to my coach and he also likes it.

B
Brian K.
Spider Chalk

Spider Chalk is the best value high-end chalk that I use for climbing. It is superior to Metolius, White Gold and others I have tried. And more cost-effective than friction labs.

J
Johnathon C.
Fantastic

Bought several blocks months ago, not even halfway through the first block. Works great and lasts forever!

S
Sham C.
5 Star Chalk

As a gym owner I have a love/hate relationship with chalk. I love to use it and I hate to clean it up after other people. Spider Chalk however doesn’t instantly shatter into a billion particles and the blocks last significantly longer than other chalk brands. It’s fab.

M
Mark L.
Nothing Better

It's simply the best chalk I've ever used. I'll never buy another brand again.

S
Sean G.
Best chalk I've used

You can actually feel the difference when compared to regular weightlifting chalk. Much denser. Better gripping.

T
Teighan D.
These blocks rock!

I bought this chalk in preparation for my CrossFit gym re-opening. I received quantity AND quality with my order. This chalk doesn’t crumble in your hands and it chalks up nicely on skin and grips. I’ve shared a few blocks with some friends at the gym and they love it as well!

E
Eric L.
Everlasting Chalk

I use my Spider Chalk for climbing so I think I probably go through it pretty fast but it still seems like it lasts forever. The blocks are super dense and it feels like the driest stuff I've used (I have fairly sweaty hands when I climb). I've left my chalk at home a few times and had to use other people's chalk and it's definitely NOT a great experience. I am shilling this stuff to every climber who asks about chalk (and most that aren't).

L
Lewis H.
Longest lasting chalk

I love this chalk! I own a commercial gym and this is by far the best chalk we’ve ever used. Great grip and lasts at least twice as long as the other chalk I used.

  • 5 stars: 129 (92%)
  • 4 stars: 11 (8%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
B
Brian

Love the chalk. Doest fall apart as easy as regular chalk

A
Anonymous
This is the best chalk i’ve used

This is the best chalk i’ve used.

A
Anonymous
Awesome quality

Awesome quality, durability, price!

S
Sheldon W.
Less IS more

Very impressed with this chalk. My members are actually able to use less chalk so my floors are cleaner too.

D
Duffy H.
Awesome product.

Awesome product.

C
Chris S.
Survey

Slightly upset i am a gym owner and asked for samples for my members to try and hopefully buy bulk order but was told my gym is too small to accomodate such a request

A
Andre G.
chalk review

Stays on longer than regular chalk

B
Brandon B.
Love the chalk

I really enjoy Spider Chalks. It gives you a better grip than other chalk.

j
joshua d.
Vreatvpurchase

Love the chalk, Love the bucket covers even more

T
Thomas P.
Good chalk

I like the feel of the chalk

T
Thomas P.
Good chalk

Works well in our Crossfit gym

J
Jaymye A.
Great Product!

Best chalk ever. Buy it.

M
Marvin P.
Spider chalk

It works fine for lifting

W
Wendy S.
Superior Chalk!

This chalk is more sticky and less messy than any brand we've used...we won't go back to anything else!

E
Eugene T.
Thanks

Great chalk, awesome grip

A
Andrew R.
Great Chalk

I received the mega block yesterday and used it for my deadlift workout. When applying the chalk to my hands, the block didn't break apart like most other chalk blocks, I didn't have to reapply the chalk after every set either. I would recommend this to anyone who powerlifts and is looking for chalk that will last longer and won't crumble as soon as the block is pressed against your hands.

S
Sheldon W.
The only chalk I will use

This chalk is great. Lasts longer and the company is speedy with orders.

A
Adam M.
Best chalk

Best chalk hands down, will definitely stock up with more

S
Shayn K.
Spider Chalk, Bricks

Excellent. What i bought is going to last me a long time.

N
NATE B.
Great chalk

Didn't know what to expect, figured chalk is chalk. I was definitely wrong. Spider chalk is amazing, very dense block doesn't break, crumble or cause excessive dust. I left a block in the chalk bin at the gym and 3 weeks later its still in one piece. The chalk itself feels great in the grip, stays dry, and has a positive feel on the bar. Works great applied directly to your hands of course, but also great for chalking straps for deadlifts and shirt for squats.
I know this 5lb order will last a very, very long time.
Extremely happy with my order.

R
Richard T.
Great chalk.

Blocks stay together nicely. Chalk works nicely and at a great price.

J
Jordan A.
I love it

This chalk is perfect. It should last me a very long time since it’s just for me at my home gym, and it only takes one application. Don’t know what else I could ask for

M
Michael M.
Great Chalk

Definitely the best chalk I've ever owned and a noticeable difference over cheaper chalk from other commercial sports stores. Bought this as a recommendation from Alan Thrall, and happy I did. Shipping for the first package was awful and not as advertised and all my blocks came broken. But customer service was excellent and sent me a new batch that came perfect. Very satisfied. Thanks!

T
Thomas P.
Good chalk

Great chalk. Have used other kinds and this one is great

J
Julio R.
Best chalk

Best chalk I've ever used

M
Max M.
Good quality

The edges were getting chipped away at first but ive had the same block now for a couple months and its still going strong. I gave a block to my coach and he also likes it.

B
Brian K.
Spider Chalk

Spider Chalk is the best value high-end chalk that I use for climbing. It is superior to Metolius, White Gold and others I have tried. And more cost-effective than friction labs.

J
Johnathon C.
Fantastic

Bought several blocks months ago, not even halfway through the first block. Works great and lasts forever!

S
Sham C.
5 Star Chalk

As a gym owner I have a love/hate relationship with chalk. I love to use it and I hate to clean it up after other people. Spider Chalk however doesn’t instantly shatter into a billion particles and the blocks last significantly longer than other chalk brands. It’s fab.

M
Mark L.
Nothing Better

It's simply the best chalk I've ever used. I'll never buy another brand again.

S
Sean G.
Best chalk I've used

You can actually feel the difference when compared to regular weightlifting chalk. Much denser. Better gripping.

T
Teighan D.
These blocks rock!

I bought this chalk in preparation for my CrossFit gym re-opening. I received quantity AND quality with my order. This chalk doesn’t crumble in your hands and it chalks up nicely on skin and grips. I’ve shared a few blocks with some friends at the gym and they love it as well!

E
Eric L.
Everlasting Chalk

I use my Spider Chalk for climbing so I think I probably go through it pretty fast but it still seems like it lasts forever. The blocks are super dense and it feels like the driest stuff I've used (I have fairly sweaty hands when I climb). I've left my chalk at home a few times and had to use other people's chalk and it's definitely NOT a great experience. I am shilling this stuff to every climber who asks about chalk (and most that aren't).

L
Lewis H.
Longest lasting chalk

I love this chalk! I own a commercial gym and this is by far the best chalk we’ve ever used. Great grip and lasts at least twice as long as the other chalk I used.