3M™ Fire Barrier Moldable Putty Pads MPP+ are a one-part,
ready-to-use, intumescent wall-opening protective. When properly applied to the back of electrical outlet
boxes, 3M™ Fire Barrier Moldable Putty Pads MPP+ help control the spread of fire, smoke and noxious gases
through fire-restive walls and partitions. Installed in accordance with the UL wall-opening protective listing
(UL Category CLIV), the product helps achieve up to 2-hour ratings in a variety of wall constructions.
3M™ Fire Barrier Moldable Putty Pads MPP+ can effectively provide protection for back-to-back electrical boxes.
3M™ Fire Barrier Moldable Putty Pads MPP+ are also used as a firestop material in through-penetration firestop
systems. 3M™ Fire Barrier Moldable Putty Pads MPP+ help to maintain a firestop penetration seal for
up to 4 hours. 3M™ Fire Barrier Moldable Putty Pads MPP+ exhibit excellent adhesion to a full range of construction
substrates and penetrants. The pads are easily molded by hand (no mixing required). In addition to
its fire-resistant properties, the 1/10th in. (2.54 mm) thick pads have airborne sound reduction characteristics
which helps minimize sound transmission through assemblies requiring an STC rating.
• Firestop tested up to 4 hours
in accordance with ASTM E 814
(UL 1479) & CAN/ULC S115
• Wall opening protective tested up to
2 hours in accordance with UL 263
• Provides draft and cold smoke seal
• Pliable and conformable—molds
easily into required shape
• Helps reduce noise transfer*
• Excellent adhesion
• Halogen-free and solvent-free
• Excellent aging properties
• Low VOC
• Will not dry out or crumble
• Red color widely recognized
as a fire protective product
4 in. x 8 in. (101.6 mm x 203 mm) 3M™ Fire Barrier Moldable Putty Pads MPP+ are typically used as a wall
opening protective to meet building requirements, for protection of membrane penetrations made by listed steel or non-metallic electrical boxes.
It is also used to seal gaps between cables in multiple penetrations (including fiber optic inner duct) and to firestop cable bundles, insulated pipe,
electrical conduit and metal pipe. Larger sized pads, 7 in. x 7 in. and 9.5 in x 9.5 in. (177.8 mm x 177.8 mm and 241.2 mm x 241.2 mm) are
widely used to firestop metallic and non-metallic electrical outlet boxes up to 14 in. x 4.5 in. by 2-1/2 in. (355.6 mm x 114.3 mm x 63.5 mm)
deep. For larger applications, pads can be molded together by hand.
3M™ Fire Barrier Moldable Putty
Pads MPP+ shall be a one component, ready-to-use, intumescent elastomer
capable of expanding a minimum of 3 times at 1000°F. The material shall
be thixotropic and shall be applicable to overhead, vertical and horizontal
firestops. Under normal conditions, 3M™ Fire Barrier Moldable Putty Pads
MPP+ shall be noncorrosive to metal and compatible with synthetic cable
jackets. The putty shall be listed by independent test agencies such as UL,
Intertek or FM. 3M™ Fire Barrier Moldable Putty Pads MPP+ shall be tested
to and pass the criteria of ASTM E 814 (UL 1479) Standard Test Method for
Fire Tests of Penetration Firestop Systems and CAN/ULC S115 Standard
Method of Fire Tests of Firestop Systems. 3M™ Fire Barrier Moldable Putty
Pads MPP+ meets the requirements of the IBC, NFPA 5000, NEC (NFPA
70), NFPA 101 and NCB (Canada) Building Codes.
Performance and Typical Physical Properties
||STC (ASTM E 90, ASTM E 413
||52 when tested on back-to-back
||10-12 lbs./gal. (1.2-1.45 kg/l)
||Tested in STC 53 rated wall assembly
|| 1/10 in. (2.54 mm)
||VOC Less H20 and Exemp Solvents
||(ASTM E 84): Flame Spread 0, Smoke Development 0
||Begins @ 350°F (177°C), Significant @ 400°F (204°C)
||Free Expansion is Nominal 3 times
||4in. x8 in. x1/10 in.(101.6 mm x203.2 mmx 2.5 mm)
||7 in. x 7 in. 1/10 in. (177.8 mmx 177.8 mm 2.5 mm)
||9.5in.x 9.5in. 1/10in. (241.3 mm x241.3 mm 2.5mm)
||2.52 in.3 (41.4 cm3)
|| 4.63 in.3 (76.0 cm3)
|| 6.1 in.3 (139.8 cm3)
||2.7 oz (76 g)
||4.1 oz (76 g)
||7.6 oz (215 g)
Packaging, Storage, Shelf Life
||Corrugated cardboard box with liner between individual pads.
||3M™ Fire Barrier Moldable Putty Pads MPP+ should be stored indoors in dry conditions.
||3M™ Fire Barrier Moldable Putty Pads MPP+ shelf life is indefinite in original unopened containers. Product will notdry or crumble in opened containers. Normal stock and stock rotation practices are recommended.
The surface of the electrical box, or opening and any penetrating items should be cleaned (i.e. free of dust, grease, oil,
loose materials, rust or other substances) to allow for the proper adhesion of the 3M™ Fire Barrier Moldable Putty+
Pad. Ensure that the surface of the substrates are not wet and are frost-free.
Electrical boxes must be firestopped under the following conditions: boxes larger that 16 sq. in. (103 sq. cm), if horizontal
spacing between boxes is less than 24 in. (609.6 mm), when multiple boxes are located in one stud cavity or if the
aggregate are of all boxes exceeds 100 sq. in. per 100 sq. ft. (645 sq. cm. per 9.29 sq. m) - refer to listed system details and
applicable local building code requirements. For electrical box installations, a minimum of 1/10 in. (2.5 mm) thick putty
application is required, 3M™ Fire Barrier Moldable Putty Pads MPP+ are to be installed to completely cover the exterior of
the outlet box (except for the side against the stud). To firestop penetrations, install the applicable depth of backing
material (if required), remove the desired amount of putty from the pad, form (if necessary) and install as detailed within
the listed system. Make sure that putty is in complete contact with the substrate and penetrating item(s). Note: Partial pads
can be pieced together and the seams between partial pads should overlap a minimum of 1/8 in. with the seams worked
with the fingertips to create adhesion at the seam.
Over application (i.e. using excessive amount of material) of product to vertical surfaces may cause sagging, follow
system details. Product is not impaired by freezing but should be warmed to 32°F (0°C) before applying.
3M™ Fire Barrier Moldable Putty Pads MPP+ are available from 3M Authorized Fire Protection Products Distributors and Dealers. 3M™ Fire Barrier Moldable Putty Pads MPP+ are available in the following sizes: (10 pads/pack, 10 packs /case) 4 in. x 8 in. x 1/10 in. (101.6 mm x 203.2 mm x 2.5 mm), (20 pads/case) 7 in. x 7 in. 1/8 in. (177.8 mm x 177.8 mm x 2.5 mm), (20 pads/case) 9.5 in. x 9.5 in. 1/8 in. (241.3 mm x 241.3 mm x 2.5 mm); red-colored firestop material. For additional technical and purchasing information regarding this and other 3M Fire Protection Products, please
call: 1-800-854-4957 or visit www.fireretardantsinc.com.