
RT400P – HEAT BLOCKING COMPOUND (12 OZ)
10226 Plano Rd, Suite 104, Dallas TX 75238
Questions? Call or text (214) 340-9421
Mon–Fri 10 am – 7 pm | Sat 10 am – 3 pm
This reusable heat-blocking putty wraps around components near a braze joint to protect them from torch heat — things like service valves, TXV bulbs, or nearby copper connections you don’t want to re-melt. Withstands direct heat up to 2000°F and can be reused multiple times.
Specs: 12 oz, reusable putty, withstands 2000°F direct heat, moldable
Replaces: RT400P — Refrigeration Technologies “Wet Rag”
Fits: Any brazing application where nearby components need heat protection. Common in HVAC compressor replacements, TXV installations, and lineset repairs.
In stock at Open To Public HVAC Parts in Dallas. Call or text (214) 340-9421 for pricing and availability.
Cross-reference numbers
This part replaces the following OEM and aftermarket numbers:
- WETRAG
Not sure if your number matches? Call (214) 340-9421 or bring the old part in — bench-testing is free.




