Muddskip Heavy Duty 3-in-1 Drywall Additive – 2 lb Bag
- Type: Heavy Duty 3-in-1 drywall additive powder
- Mix rate: One 2 lb bag per standard compound bag, box or 4.5-gallon bucket
- Job: Seams, base coat, finish coat, heavy repairs and textures through Level 3-4
- Recoat: Wet on wet once dry to the touch
- Pairing: Same-day Level 3-4 finish; choose Level 5 Smooth for Level 5+
Muddskip Heavy Duty is a powdered 3-in-1 drywall additive that you mix into your own joint compound. It isn't pre-mixed mud, and compound isn't included. It's sold in a 2 lb bag and handles seams, base coat, finish coat, heavy repairs, and textures for a same-day Level 3–4 finish.
How to Mix It
One 2 lb bag goes into one typical 18 lb bag, 35 lb box or 4.5-gallon bucket of joint compound. Add water as needed, and scale down for a partial batch. Heavy Duty can also go into a dry quick-set mix.
Same-Day Coats, Wet on Wet
You can recoat once the last coat is dry to the touch, without waiting for a full dry. It doesn't make compound dry faster. It lets you get the next coat on sooner. Heavy Duty is built for a same-day Level 3–4 finish. If the wall needs a Level 5+ finish, follow it with Level 5 Smooth.
Sanding
No sanding is necessary unless you want to. Dried coats can be rehydrated and retooled. If you do sand, use nothing coarser than 150 grit, and 220 to 320 is preferred.
Hot Mud or Premix
You can mix Heavy Duty into premixed compound or into setting-type compound. Just don't combine the two in one system unless current technical guidance allows it. Save all-purpose compound for taping, bedding, blocking, fills and heavy repairs rather than finish coats.
Bonding and Surfaces
On many substrates, you won't need a separate primer or bonding agent. That isn't true of every surface. Wallpapered or unknown surfaces may still need a sealer or primer.
Heavy Duty vs Level 5 Smooth
Smooth vs Heavy Duty, built for every finish. They're different formulas, not two sizes of one product.
- Heavy Duty: seams, base coat, finish coat, and a same-day Level 3–4 finish, plus heavy repairs and textures
- Level 5 Smooth: seams, base coat, finish coat, and a same-day Level 5+ finish
If the job calls for a Level 5+ finish, use Muddskip Level 5 Smooth.
Before You Start
Keep the room between 55°F and 95°F (13–35°C) for 24 hours before finishing and while you work. Results depend on your compound, conditions, substrate and technique, so test a small area before a large job. Control dust when you mix or sand. The Heavy Duty safety data sheet (SDS) is on the technical data page.
Browse our mud additives collection for more ways to adjust your mud.
Specifications
| Specification | Detail | Specification | Detail |
|---|---|---|---|
| Brand | Muddskip (Muddskip LLC) | Product | Heavy Duty 3-in-1 Drywall Additive |
| Package | 2 lb bag | Net weight | 2 lb (0.91 kg) |
| Mix rate | One 2 lb bag per typical joint compound bag, box or 4.5-gallon bucket | Use | Seams, base coat, finish coat, same-day finish, heavy repairs, and textures through Level 3–4 |
| Recoat | Wet on wet once dry to the touch | Quick-set use | Can be added to dry quick-set mix |
| Sanding | No sanding is necessary unless you want to | Host compound | Premix or setting-type, not combined in one system; all-purpose for bedding and fills |
| Application temperature | 55–95°F (13–35°C) for 24 hours before and during finishing | Origin | Made in the USA |